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IS 1570 (Part 4) 21Cr4Mo2 vs IS 1570 (Part 4) 30Cr4Mo2

Close Alternative — 82.6% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 21Cr4Mo2 (IS 1570 (Part 4):1988) and IS 1570 (Part 4) 30Cr4Mo2 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 4) 30Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 21Cr4Mo2 vs IS 1570 (Part 4) 30Cr4Mo2 is a 82.6% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 82.6%.

Frequently Compared With IS 1570 (Part 4) 21Cr4Mo2:
IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 12Cr4Mo5H IS 1570 (Part 7) 10Mo6H IS 1570 (Part 7) 12Cr2Mo5V2H IS 11169 (Part 1) 12Cr4Mo2 IS 1570 (Part 4) 103Cr4 NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 12Cr9Mo10H GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
82.6%
MECHANICAL MATCH
No shared data
OVERALL
82.6%
Specifications
Property IS 1570 (Part 4) 21Cr4Mo2 IS 1570 (Part 4) 30Cr4Mo2
Standard IS 1570 (Part 4):1988 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) <=0.26 0.28-0.33
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.60-0.90 0.40-0.80
Cr (%) 0.90-1.20 0.80-1.10
Mo (%) 0.15-0.30 0.15-0.28
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 4) 21Cr4Mo2 IS 1570 (Part 4) 30Cr4Mo2
Tensile Strength 790-990 MPa Not specified
Yield Strength >=610 MPa Not specified
Condition Sheet and strip, hardened and tempered or cold rolled and tempered Not specified
Can IS 1570 (Part 4) 21Cr4Mo2 Be Substituted With IS 1570 (Part 4) 30Cr4Mo2?
IS 1570 (Part 4) 21Cr4Mo2 and IS 1570 (Part 4) 30Cr4Mo2 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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IS 1570 (Part 4) 21Cr4Mo2
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IS 1570 (Part 4) 30Cr4Mo2
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 21Cr4Mo2 and IS 1570 (Part 4) 30Cr4Mo2?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1570 (Part 4) 21Cr4Mo2 be substituted with IS 1570 (Part 4) 30Cr4Mo2?
IS 1570 (Part 4) 21Cr4Mo2 and IS 1570 (Part 4) 30Cr4Mo2 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.